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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> *  Licensed to the Apache Software Foundation (ASF) under one</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *  or more contributor license agreements.  See the NOTICE file</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> *  distributed with this work for additional information</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> *  regarding copyright ownership.  The ASF licenses this file</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> *  to you under the Apache License, Version 2.0 (the</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *  "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *  with the License.  You may obtain a copy of the License at</em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> *    <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> *  Unless required by applicable law or agreed to in writing,</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> *  software distributed under the License is distributed on an</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> *  KIND, either express or implied.  See the License for the</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_comment"> *  specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_comment"> *  under the License.</em>
<a class="jxr_linenumber" name="18" href="#18">18</a>  <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">package</strong> org.apache.directory.mavibot.btree;
<a class="jxr_linenumber" name="21" href="#21">21</a>  
<a class="jxr_linenumber" name="22" href="#22">22</a>  
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.io.IOException;
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.lang.reflect.Array;
<a class="jxr_linenumber" name="25" href="#25">25</a>  
<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.KeyHolder;
<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.Page;
<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.exception.EndOfFileExceededException;
<a class="jxr_linenumber" name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.exception.KeyNotFoundException;
<a class="jxr_linenumber" name="30" href="#30">30</a>  
<a class="jxr_linenumber" name="31" href="#31">31</a>  
<a class="jxr_linenumber" name="32" href="#32">32</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="33" href="#33">33</a>  <em class="jxr_javadoccomment"> * A MVCC abstract Page. It stores the field and the methods shared by the Node and Leaf</em>
<a class="jxr_linenumber" name="34" href="#34">34</a>  <em class="jxr_javadoccomment"> * classes.</em>
<a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_javadoccomment"> * </em>
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_javadoccomment"> * @param &lt;K&gt; The type for the Key</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_javadoccomment"> * @param &lt;V&gt; The type for the stored value</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="39" href="#39">39</a>  <em class="jxr_javadoccomment"> * @author &lt;a href="<a href="mailto:dev@directory.apache.org" target="alexandria_uri">mailto:dev@directory.apache.org</a>"&gt;Apache Directory Project&lt;/a&gt;</em>
<a class="jxr_linenumber" name="40" href="#40">40</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="41" href="#41">41</a>  <em class="jxr_comment">/*<em class="jxr_comment"> No qualifier*/</em><strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">class</strong> AbstractPage&lt;K, V&gt; <strong class="jxr_keyword">implements</strong> Page&lt;K, V&gt;</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  {
<a class="jxr_linenumber" name="43" href="#43">43</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Parent B+Tree. */</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">transient</strong> BTree&lt;K, V&gt; btree;
<a class="jxr_linenumber" name="45" href="#45">45</a>  
<a class="jxr_linenumber" name="46" href="#46">46</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Keys of children nodes */</em>
<a class="jxr_linenumber" name="47" href="#47">47</a>      <strong class="jxr_keyword">protected</strong> KeyHolder&lt;K&gt;[] keys;
<a class="jxr_linenumber" name="48" href="#48">48</a>  
<a class="jxr_linenumber" name="49" href="#49">49</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Children pages associated with keys. */</em>
<a class="jxr_linenumber" name="50" href="#50">50</a>      <strong class="jxr_keyword">protected</strong> PageHolder&lt;K, V&gt;[] children;
<a class="jxr_linenumber" name="51" href="#51">51</a>  
<a class="jxr_linenumber" name="52" href="#52">52</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The number of current values in the <a href="../../../../../org/apache/directory/mavibot/btree/Page.html">Page</a> */</em>
<a class="jxr_linenumber" name="53" href="#53">53</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> nbElems;
<a class="jxr_linenumber" name="54" href="#54">54</a>  
<a class="jxr_linenumber" name="55" href="#55">55</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> This BPage's revision */</em>
<a class="jxr_linenumber" name="56" href="#56">56</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">long</strong> revision;
<a class="jxr_linenumber" name="57" href="#57">57</a>  
<a class="jxr_linenumber" name="58" href="#58">58</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The first {@link PageIO} storing the serialized Page on disk */</em>
<a class="jxr_linenumber" name="59" href="#59">59</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">long</strong> offset = -1L;
<a class="jxr_linenumber" name="60" href="#60">60</a>  
<a class="jxr_linenumber" name="61" href="#61">61</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The last {@link PageIO} storing the serialized Page on disk */</em>
<a class="jxr_linenumber" name="62" href="#62">62</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">long</strong> lastOffset = -1L;
<a class="jxr_linenumber" name="63" href="#63">63</a>  
<a class="jxr_linenumber" name="64" href="#64">64</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> A static Exception used to avoid creating a new one every time */</em>
<a class="jxr_linenumber" name="65" href="#65">65</a>      <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/directory/mavibot/btree/exception/KeyNotFoundException.html">KeyNotFoundException</a> KEY_NOT_FOUND_EXCEPTION = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/directory/mavibot/btree/exception/KeyNotFoundException.html">KeyNotFoundException</a>(
<a class="jxr_linenumber" name="66" href="#66">66</a>          <span class="jxr_string">"Cannot find an entry associated with this key"</span> );
<a class="jxr_linenumber" name="67" href="#67">67</a>  
<a class="jxr_linenumber" name="68" href="#68">68</a>  
<a class="jxr_linenumber" name="69" href="#69">69</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="70" href="#70">70</a>  <em class="jxr_javadoccomment">     * Creates a default empty AbstractPage</em>
<a class="jxr_linenumber" name="71" href="#71">71</a>  <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="72" href="#72">72</a>  <em class="jxr_javadoccomment">     * @param btree The associated BTree</em>
<a class="jxr_linenumber" name="73" href="#73">73</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="74" href="#74">74</a>      <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/directory/mavibot/btree/AbstractPage.html">AbstractPage</a>( BTree&lt;K, V&gt; btree )
<a class="jxr_linenumber" name="75" href="#75">75</a>      {
<a class="jxr_linenumber" name="76" href="#76">76</a>          <strong class="jxr_keyword">this</strong>.btree = btree;
<a class="jxr_linenumber" name="77" href="#77">77</a>      }
<a class="jxr_linenumber" name="78" href="#78">78</a>  
<a class="jxr_linenumber" name="79" href="#79">79</a>  
<a class="jxr_linenumber" name="80" href="#80">80</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="81" href="#81">81</a>  <em class="jxr_javadoccomment">     * Internal constructor used to create Page instance used when a page is being copied or overflow</em>
<a class="jxr_linenumber" name="82" href="#82">82</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="83" href="#83">83</a>      @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a class="jxr_linenumber" name="84" href="#84">84</a>      <em class="jxr_comment">// Cannot create an array of generic objects</em>
<a class="jxr_linenumber" name="85" href="#85">85</a>      <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/directory/mavibot/btree/AbstractPage.html">AbstractPage</a>( BTree&lt;K, V&gt; btree, <strong class="jxr_keyword">long</strong> revision, <strong class="jxr_keyword">int</strong> nbElems )
<a class="jxr_linenumber" name="86" href="#86">86</a>      {
<a class="jxr_linenumber" name="87" href="#87">87</a>          <strong class="jxr_keyword">this</strong>.btree = btree;
<a class="jxr_linenumber" name="88" href="#88">88</a>          <strong class="jxr_keyword">this</strong>.revision = revision;
<a class="jxr_linenumber" name="89" href="#89">89</a>          <strong class="jxr_keyword">this</strong>.nbElems = nbElems;
<a class="jxr_linenumber" name="90" href="#90">90</a>          <strong class="jxr_keyword">this</strong>.keys = ( KeyHolder[] ) Array.newInstance( KeyHolder.<strong class="jxr_keyword">class</strong>, nbElems );
<a class="jxr_linenumber" name="91" href="#91">91</a>      }
<a class="jxr_linenumber" name="92" href="#92">92</a>  
<a class="jxr_linenumber" name="93" href="#93">93</a>  
<a class="jxr_linenumber" name="94" href="#94">94</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="95" href="#95">95</a>  <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="96" href="#96">96</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="97" href="#97">97</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getNbElems()
<a class="jxr_linenumber" name="98" href="#98">98</a>      {
<a class="jxr_linenumber" name="99" href="#99">99</a>          <strong class="jxr_keyword">return</strong> nbElems;
<a class="jxr_linenumber" name="100" href="#100">100</a>     }
<a class="jxr_linenumber" name="101" href="#101">101</a> 
<a class="jxr_linenumber" name="102" href="#102">102</a> 
<a class="jxr_linenumber" name="103" href="#103">103</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="104" href="#104">104</a> <em class="jxr_javadoccomment">     * Sets the number of element in this page</em>
<a class="jxr_linenumber" name="105" href="#105">105</a> <em class="jxr_javadoccomment">     * @param nbElems The number of elements</em>
<a class="jxr_linenumber" name="106" href="#106">106</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="107" href="#107">107</a>     <em class="jxr_comment">/*<em class="jxr_comment"> no qualifier */</em><strong class="jxr_keyword">void</strong> setNbElems( <strong class="jxr_keyword">int</strong> nbElems )</em>
<a class="jxr_linenumber" name="108" href="#108">108</a>     {
<a class="jxr_linenumber" name="109" href="#109">109</a>         <strong class="jxr_keyword">this</strong>.nbElems = nbElems;
<a class="jxr_linenumber" name="110" href="#110">110</a>     }
<a class="jxr_linenumber" name="111" href="#111">111</a> 
<a class="jxr_linenumber" name="112" href="#112">112</a> 
<a class="jxr_linenumber" name="113" href="#113">113</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="114" href="#114">114</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="115" href="#115">115</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="116" href="#116">116</a>     <strong class="jxr_keyword">public</strong> K getKey( <strong class="jxr_keyword">int</strong> pos )
<a class="jxr_linenumber" name="117" href="#117">117</a>     {
<a class="jxr_linenumber" name="118" href="#118">118</a>         <strong class="jxr_keyword">if</strong> ( ( pos &lt; nbElems ) &amp;&amp; ( keys[pos] != <strong class="jxr_keyword">null</strong> ) )
<a class="jxr_linenumber" name="119" href="#119">119</a>         {
<a class="jxr_linenumber" name="120" href="#120">120</a>             <strong class="jxr_keyword">return</strong> keys[pos].getKey();
<a class="jxr_linenumber" name="121" href="#121">121</a>         }
<a class="jxr_linenumber" name="122" href="#122">122</a>         <strong class="jxr_keyword">else</strong>
<a class="jxr_linenumber" name="123" href="#123">123</a>         {
<a class="jxr_linenumber" name="124" href="#124">124</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="125" href="#125">125</a>         }
<a class="jxr_linenumber" name="126" href="#126">126</a>     }
<a class="jxr_linenumber" name="127" href="#127">127</a> 
<a class="jxr_linenumber" name="128" href="#128">128</a> 
<a class="jxr_linenumber" name="129" href="#129">129</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="130" href="#130">130</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="131" href="#131">131</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="132" href="#132">132</a>     @Override
<a class="jxr_linenumber" name="133" href="#133">133</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> hasKey( K key ) <strong class="jxr_keyword">throws</strong> IOException
<a class="jxr_linenumber" name="134" href="#134">134</a>     {
<a class="jxr_linenumber" name="135" href="#135">135</a>         <strong class="jxr_keyword">int</strong> pos = findPos( key );
<a class="jxr_linenumber" name="136" href="#136">136</a> 
<a class="jxr_linenumber" name="137" href="#137">137</a>         <strong class="jxr_keyword">if</strong> ( pos &lt; 0 )
<a class="jxr_linenumber" name="138" href="#138">138</a>         {
<a class="jxr_linenumber" name="139" href="#139">139</a>             <em class="jxr_comment">// Here, if we have found the key in the node, then we must go down into</em>
<a class="jxr_linenumber" name="140" href="#140">140</a>             <em class="jxr_comment">// the right child, not the left one</em>
<a class="jxr_linenumber" name="141" href="#141">141</a>             <strong class="jxr_keyword">return</strong> children[-pos].getValue().hasKey( key );
<a class="jxr_linenumber" name="142" href="#142">142</a>         }
<a class="jxr_linenumber" name="143" href="#143">143</a>         <strong class="jxr_keyword">else</strong>
<a class="jxr_linenumber" name="144" href="#144">144</a>         {
<a class="jxr_linenumber" name="145" href="#145">145</a>             Page&lt;K, V&gt; page = children[pos].getValue();
<a class="jxr_linenumber" name="146" href="#146">146</a> 
<a class="jxr_linenumber" name="147" href="#147">147</a>             <strong class="jxr_keyword">if</strong> ( page == <strong class="jxr_keyword">null</strong> )
<a class="jxr_linenumber" name="148" href="#148">148</a>             {
<a class="jxr_linenumber" name="149" href="#149">149</a>                 System.out.println( <span class="jxr_string">"Page is null for pos = "</span> + pos + <span class="jxr_string">", children = "</span> + children[pos] );
<a class="jxr_linenumber" name="150" href="#150">150</a>             }
<a class="jxr_linenumber" name="151" href="#151">151</a> 
<a class="jxr_linenumber" name="152" href="#152">152</a>             <strong class="jxr_keyword">return</strong> page.hasKey( key );
<a class="jxr_linenumber" name="153" href="#153">153</a>         }
<a class="jxr_linenumber" name="154" href="#154">154</a>     }
<a class="jxr_linenumber" name="155" href="#155">155</a> 
<a class="jxr_linenumber" name="156" href="#156">156</a> 
<a class="jxr_linenumber" name="157" href="#157">157</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="158" href="#158">158</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="159" href="#159">159</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="160" href="#160">160</a>     <em class="jxr_comment">/*<em class="jxr_comment"> no qualifier */</em>Page&lt;K, V&gt; getReference( <strong class="jxr_keyword">int</strong> pos ) <strong class="jxr_keyword">throws</strong> IOException</em>
<a class="jxr_linenumber" name="161" href="#161">161</a>     {
<a class="jxr_linenumber" name="162" href="#162">162</a>         <strong class="jxr_keyword">if</strong> ( pos &lt; nbElems + 1 )
<a class="jxr_linenumber" name="163" href="#163">163</a>         {
<a class="jxr_linenumber" name="164" href="#164">164</a>             <strong class="jxr_keyword">return</strong> children[pos].getValue();
<a class="jxr_linenumber" name="165" href="#165">165</a>         }
<a class="jxr_linenumber" name="166" href="#166">166</a>         <strong class="jxr_keyword">else</strong>
<a class="jxr_linenumber" name="167" href="#167">167</a>         {
<a class="jxr_linenumber" name="168" href="#168">168</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="169" href="#169">169</a>         }
<a class="jxr_linenumber" name="170" href="#170">170</a>     }
<a class="jxr_linenumber" name="171" href="#171">171</a> 
<a class="jxr_linenumber" name="172" href="#172">172</a> 
<a class="jxr_linenumber" name="173" href="#173">173</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="174" href="#174">174</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="175" href="#175">175</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="176" href="#176">176</a>     <strong class="jxr_keyword">public</strong> TupleCursor&lt;K, V&gt; browse( K key, ReadTransaction&lt;K, V&gt; transaction, ParentPos&lt;K, V&gt;[] stack, <strong class="jxr_keyword">int</strong> depth )
<a class="jxr_linenumber" name="177" href="#177">177</a>         <strong class="jxr_keyword">throws</strong> IOException
<a class="jxr_linenumber" name="178" href="#178">178</a>     {
<a class="jxr_linenumber" name="179" href="#179">179</a>         <strong class="jxr_keyword">int</strong> pos = findPos( key );
<a class="jxr_linenumber" name="180" href="#180">180</a> 
<a class="jxr_linenumber" name="181" href="#181">181</a>         <strong class="jxr_keyword">if</strong> ( pos &lt; 0 )
<a class="jxr_linenumber" name="182" href="#182">182</a>         {
<a class="jxr_linenumber" name="183" href="#183">183</a>             pos = -pos;
<a class="jxr_linenumber" name="184" href="#184">184</a>         }
<a class="jxr_linenumber" name="185" href="#185">185</a> 
<a class="jxr_linenumber" name="186" href="#186">186</a>         <em class="jxr_comment">// We first stack the current page</em>
<a class="jxr_linenumber" name="187" href="#187">187</a>         stack[depth++] = <strong class="jxr_keyword">new</strong> ParentPos&lt;K, V&gt;( <strong class="jxr_keyword">this</strong>, pos );
<a class="jxr_linenumber" name="188" href="#188">188</a> 
<a class="jxr_linenumber" name="189" href="#189">189</a>         Page&lt;K, V&gt; page = children[pos].getValue();
<a class="jxr_linenumber" name="190" href="#190">190</a> 
<a class="jxr_linenumber" name="191" href="#191">191</a>         <strong class="jxr_keyword">return</strong> page.browse( key, transaction, stack, depth );
<a class="jxr_linenumber" name="192" href="#192">192</a>     }
<a class="jxr_linenumber" name="193" href="#193">193</a> 
<a class="jxr_linenumber" name="194" href="#194">194</a> 
<a class="jxr_linenumber" name="195" href="#195">195</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="196" href="#196">196</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="197" href="#197">197</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="198" href="#198">198</a>     @Override
<a class="jxr_linenumber" name="199" href="#199">199</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> contains( K key, V value ) <strong class="jxr_keyword">throws</strong> IOException
<a class="jxr_linenumber" name="200" href="#200">200</a>     {
<a class="jxr_linenumber" name="201" href="#201">201</a>         <strong class="jxr_keyword">int</strong> pos = findPos( key );
<a class="jxr_linenumber" name="202" href="#202">202</a> 
<a class="jxr_linenumber" name="203" href="#203">203</a>         <strong class="jxr_keyword">if</strong> ( pos &lt; 0 )
<a class="jxr_linenumber" name="204" href="#204">204</a>         {
<a class="jxr_linenumber" name="205" href="#205">205</a>             <em class="jxr_comment">// Here, if we have found the key in the node, then we must go down into</em>
<a class="jxr_linenumber" name="206" href="#206">206</a>             <em class="jxr_comment">// the right child, not the left one</em>
<a class="jxr_linenumber" name="207" href="#207">207</a>             <strong class="jxr_keyword">return</strong> children[-pos].getValue().contains( key, value );
<a class="jxr_linenumber" name="208" href="#208">208</a>         }
<a class="jxr_linenumber" name="209" href="#209">209</a>         <strong class="jxr_keyword">else</strong>
<a class="jxr_linenumber" name="210" href="#210">210</a>         {
<a class="jxr_linenumber" name="211" href="#211">211</a>             <strong class="jxr_keyword">return</strong> children[pos].getValue().contains( key, value );
<a class="jxr_linenumber" name="212" href="#212">212</a>         }
<a class="jxr_linenumber" name="213" href="#213">213</a>     }
<a class="jxr_linenumber" name="214" href="#214">214</a> 
<a class="jxr_linenumber" name="215" href="#215">215</a> 
<a class="jxr_linenumber" name="216" href="#216">216</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="217" href="#217">217</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="218" href="#218">218</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="219" href="#219">219</a>     <strong class="jxr_keyword">public</strong> V get( K key ) <strong class="jxr_keyword">throws</strong> IOException, KeyNotFoundException
<a class="jxr_linenumber" name="220" href="#220">220</a>     {
<a class="jxr_linenumber" name="221" href="#221">221</a>         <strong class="jxr_keyword">int</strong> pos = findPos( key );
<a class="jxr_linenumber" name="222" href="#222">222</a> 
<a class="jxr_linenumber" name="223" href="#223">223</a>         <strong class="jxr_keyword">if</strong> ( pos &lt; 0 )
<a class="jxr_linenumber" name="224" href="#224">224</a>         {
<a class="jxr_linenumber" name="225" href="#225">225</a>             <em class="jxr_comment">// Here, if we have found the key in the node, then we must go down into</em>
<a class="jxr_linenumber" name="226" href="#226">226</a>             <em class="jxr_comment">// the right child, not the left one</em>
<a class="jxr_linenumber" name="227" href="#227">227</a>             <strong class="jxr_keyword">return</strong> children[-pos].getValue().get( key );
<a class="jxr_linenumber" name="228" href="#228">228</a>         }
<a class="jxr_linenumber" name="229" href="#229">229</a>         <strong class="jxr_keyword">else</strong>
<a class="jxr_linenumber" name="230" href="#230">230</a>         {
<a class="jxr_linenumber" name="231" href="#231">231</a>             <strong class="jxr_keyword">return</strong> children[pos].getValue().get( key );
<a class="jxr_linenumber" name="232" href="#232">232</a>         }
<a class="jxr_linenumber" name="233" href="#233">233</a>     }
<a class="jxr_linenumber" name="234" href="#234">234</a> 
<a class="jxr_linenumber" name="235" href="#235">235</a> 
<a class="jxr_linenumber" name="236" href="#236">236</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="237" href="#237">237</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="238" href="#238">238</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="239" href="#239">239</a>     <em class="jxr_comment">/*<em class="jxr_comment"> no qualifier */</em>Page&lt;K, V&gt; getPage( <strong class="jxr_keyword">int</strong> pos )</em>
<a class="jxr_linenumber" name="240" href="#240">240</a>     {
<a class="jxr_linenumber" name="241" href="#241">241</a>         <strong class="jxr_keyword">if</strong> ( ( pos &gt;= 0 ) &amp;&amp; ( pos &lt; children.length ) )
<a class="jxr_linenumber" name="242" href="#242">242</a>         {
<a class="jxr_linenumber" name="243" href="#243">243</a>             <strong class="jxr_keyword">return</strong> children[pos].getValue();
<a class="jxr_linenumber" name="244" href="#244">244</a>         }
<a class="jxr_linenumber" name="245" href="#245">245</a>         <strong class="jxr_keyword">else</strong>
<a class="jxr_linenumber" name="246" href="#246">246</a>         {
<a class="jxr_linenumber" name="247" href="#247">247</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="248" href="#248">248</a>         }
<a class="jxr_linenumber" name="249" href="#249">249</a>     }
<a class="jxr_linenumber" name="250" href="#250">250</a> 
<a class="jxr_linenumber" name="251" href="#251">251</a> 
<a class="jxr_linenumber" name="252" href="#252">252</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="253" href="#253">253</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="254" href="#254">254</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="255" href="#255">255</a>     <em class="jxr_comment">/*<em class="jxr_comment"> no qualifier */</em><strong class="jxr_keyword">void</strong> setPageHolder( <strong class="jxr_keyword">int</strong> pos, PageHolder&lt;K, V&gt; pageHolder )</em>
<a class="jxr_linenumber" name="256" href="#256">256</a>     {
<a class="jxr_linenumber" name="257" href="#257">257</a>         <strong class="jxr_keyword">if</strong> ( ( pos &gt;= 0 ) &amp;&amp; ( pos &lt; children.length ) )
<a class="jxr_linenumber" name="258" href="#258">258</a>         {
<a class="jxr_linenumber" name="259" href="#259">259</a>             children[pos] = pageHolder;
<a class="jxr_linenumber" name="260" href="#260">260</a>         }
<a class="jxr_linenumber" name="261" href="#261">261</a>     }
<a class="jxr_linenumber" name="262" href="#262">262</a> 
<a class="jxr_linenumber" name="263" href="#263">263</a> 
<a class="jxr_linenumber" name="264" href="#264">264</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="265" href="#265">265</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="266" href="#266">266</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="267" href="#267">267</a>     @Override
<a class="jxr_linenumber" name="268" href="#268">268</a>     <strong class="jxr_keyword">public</strong> ValueCursor&lt;V&gt; getValues( K key ) <strong class="jxr_keyword">throws</strong> KeyNotFoundException, IOException, IllegalArgumentException
<a class="jxr_linenumber" name="269" href="#269">269</a>     {
<a class="jxr_linenumber" name="270" href="#270">270</a>         <strong class="jxr_keyword">int</strong> pos = findPos( key );
<a class="jxr_linenumber" name="271" href="#271">271</a> 
<a class="jxr_linenumber" name="272" href="#272">272</a>         <strong class="jxr_keyword">if</strong> ( pos &lt; 0 )
<a class="jxr_linenumber" name="273" href="#273">273</a>         {
<a class="jxr_linenumber" name="274" href="#274">274</a>             <em class="jxr_comment">// Here, if we have found the key in the node, then we must go down into</em>
<a class="jxr_linenumber" name="275" href="#275">275</a>             <em class="jxr_comment">// the right child, not the left one</em>
<a class="jxr_linenumber" name="276" href="#276">276</a>             <strong class="jxr_keyword">return</strong> children[-pos].getValue().getValues( key );
<a class="jxr_linenumber" name="277" href="#277">277</a>         }
<a class="jxr_linenumber" name="278" href="#278">278</a>         <strong class="jxr_keyword">else</strong>
<a class="jxr_linenumber" name="279" href="#279">279</a>         {
<a class="jxr_linenumber" name="280" href="#280">280</a>             <strong class="jxr_keyword">return</strong> children[pos].getValue().getValues( key );
<a class="jxr_linenumber" name="281" href="#281">281</a>         }
<a class="jxr_linenumber" name="282" href="#282">282</a>     }
<a class="jxr_linenumber" name="283" href="#283">283</a> 
<a class="jxr_linenumber" name="284" href="#284">284</a> 
<a class="jxr_linenumber" name="285" href="#285">285</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="286" href="#286">286</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="287" href="#287">287</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="288" href="#288">288</a>     <strong class="jxr_keyword">public</strong> TupleCursor&lt;K, V&gt; browse( ReadTransaction&lt;K, V&gt; transaction, ParentPos&lt;K, V&gt;[] stack, <strong class="jxr_keyword">int</strong> depth )
<a class="jxr_linenumber" name="289" href="#289">289</a>         <strong class="jxr_keyword">throws</strong> IOException
<a class="jxr_linenumber" name="290" href="#290">290</a>     {
<a class="jxr_linenumber" name="291" href="#291">291</a>         stack[depth++] = <strong class="jxr_keyword">new</strong> ParentPos&lt;K, V&gt;( <strong class="jxr_keyword">this</strong>, 0 );
<a class="jxr_linenumber" name="292" href="#292">292</a> 
<a class="jxr_linenumber" name="293" href="#293">293</a>         Page&lt;K, V&gt; page = children[0].getValue();
<a class="jxr_linenumber" name="294" href="#294">294</a> 
<a class="jxr_linenumber" name="295" href="#295">295</a>         <strong class="jxr_keyword">return</strong> page.browse( transaction, stack, depth );
<a class="jxr_linenumber" name="296" href="#296">296</a>     }
<a class="jxr_linenumber" name="297" href="#297">297</a> 
<a class="jxr_linenumber" name="298" href="#298">298</a> 
<a class="jxr_linenumber" name="299" href="#299">299</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="300" href="#300">300</a> <em class="jxr_javadoccomment">     * Selects the sibling (the previous or next page with the same parent) which has</em>
<a class="jxr_linenumber" name="301" href="#301">301</a> <em class="jxr_javadoccomment">     * the more element assuming it's above N/2</em>
<a class="jxr_linenumber" name="302" href="#302">302</a> <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="303" href="#303">303</a> <em class="jxr_javadoccomment">     * @param parent The parent of the current page</em>
<a class="jxr_linenumber" name="304" href="#304">304</a> <em class="jxr_javadoccomment">     * @param The position of the current page reference in its parent</em>
<a class="jxr_linenumber" name="305" href="#305">305</a> <em class="jxr_javadoccomment">     * @return The position of the sibling, or -1 if we have'nt found any sibling</em>
<a class="jxr_linenumber" name="306" href="#306">306</a> <em class="jxr_javadoccomment">     * @throws IOException If we have an error while trying to access the page</em>
<a class="jxr_linenumber" name="307" href="#307">307</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="308" href="#308">308</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> selectSibling( Page&lt;K, V&gt; parent, <strong class="jxr_keyword">int</strong> parentPos ) <strong class="jxr_keyword">throws</strong> IOException
<a class="jxr_linenumber" name="309" href="#309">309</a>     {
<a class="jxr_linenumber" name="310" href="#310">310</a>         <strong class="jxr_keyword">if</strong> ( parentPos == 0 )
<a class="jxr_linenumber" name="311" href="#311">311</a>         {
<a class="jxr_linenumber" name="312" href="#312">312</a>             <em class="jxr_comment">// The current page is referenced on the left of its parent's page :</em>
<a class="jxr_linenumber" name="313" href="#313">313</a>             <em class="jxr_comment">// we will not have a previous page with the same parent</em>
<a class="jxr_linenumber" name="314" href="#314">314</a>             <strong class="jxr_keyword">return</strong> 1;
<a class="jxr_linenumber" name="315" href="#315">315</a>         }
<a class="jxr_linenumber" name="316" href="#316">316</a> 
<a class="jxr_linenumber" name="317" href="#317">317</a>         <strong class="jxr_keyword">if</strong> ( parentPos == parent.getNbElems() )
<a class="jxr_linenumber" name="318" href="#318">318</a>         {
<a class="jxr_linenumber" name="319" href="#319">319</a>             <em class="jxr_comment">// The current page is referenced on the right of its parent's page :</em>
<a class="jxr_linenumber" name="320" href="#320">320</a>             <em class="jxr_comment">// we will not have a next page with the same parent</em>
<a class="jxr_linenumber" name="321" href="#321">321</a>             <strong class="jxr_keyword">return</strong> parentPos - 1;
<a class="jxr_linenumber" name="322" href="#322">322</a>         }
<a class="jxr_linenumber" name="323" href="#323">323</a> 
<a class="jxr_linenumber" name="324" href="#324">324</a>         Page&lt;K, V&gt; prevPage = ( ( AbstractPage&lt;K, V&gt; ) parent ).getPage( parentPos - 1 );
<a class="jxr_linenumber" name="325" href="#325">325</a>         Page&lt;K, V&gt; nextPage = ( ( AbstractPage&lt;K, V&gt; ) parent ).getPage( parentPos + 1 );
<a class="jxr_linenumber" name="326" href="#326">326</a> 
<a class="jxr_linenumber" name="327" href="#327">327</a>         <strong class="jxr_keyword">int</strong> prevPageSize = prevPage.getNbElems();
<a class="jxr_linenumber" name="328" href="#328">328</a>         <strong class="jxr_keyword">int</strong> nextPageSize = nextPage.getNbElems();
<a class="jxr_linenumber" name="329" href="#329">329</a> 
<a class="jxr_linenumber" name="330" href="#330">330</a>         <strong class="jxr_keyword">if</strong> ( prevPageSize &gt;= nextPageSize )
<a class="jxr_linenumber" name="331" href="#331">331</a>         {
<a class="jxr_linenumber" name="332" href="#332">332</a>             <strong class="jxr_keyword">return</strong> parentPos - 1;
<a class="jxr_linenumber" name="333" href="#333">333</a>         }
<a class="jxr_linenumber" name="334" href="#334">334</a>         <strong class="jxr_keyword">else</strong>
<a class="jxr_linenumber" name="335" href="#335">335</a>         {
<a class="jxr_linenumber" name="336" href="#336">336</a>             <strong class="jxr_keyword">return</strong> parentPos + 1;
<a class="jxr_linenumber" name="337" href="#337">337</a>         }
<a class="jxr_linenumber" name="338" href="#338">338</a>     }
<a class="jxr_linenumber" name="339" href="#339">339</a> 
<a class="jxr_linenumber" name="340" href="#340">340</a> 
<a class="jxr_linenumber" name="341" href="#341">341</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="342" href="#342">342</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="343" href="#343">343</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="344" href="#344">344</a>     <strong class="jxr_keyword">public</strong> K getLeftMostKey()
<a class="jxr_linenumber" name="345" href="#345">345</a>     {
<a class="jxr_linenumber" name="346" href="#346">346</a>         <strong class="jxr_keyword">return</strong> keys[0].getKey();
<a class="jxr_linenumber" name="347" href="#347">347</a>     }
<a class="jxr_linenumber" name="348" href="#348">348</a> 
<a class="jxr_linenumber" name="349" href="#349">349</a> 
<a class="jxr_linenumber" name="350" href="#350">350</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="351" href="#351">351</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="352" href="#352">352</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="353" href="#353">353</a>     <strong class="jxr_keyword">public</strong> K getRightMostKey()
<a class="jxr_linenumber" name="354" href="#354">354</a>     {
<a class="jxr_linenumber" name="355" href="#355">355</a>         <strong class="jxr_keyword">return</strong> keys[nbElems - 1].getKey();
<a class="jxr_linenumber" name="356" href="#356">356</a>     }
<a class="jxr_linenumber" name="357" href="#357">357</a> 
<a class="jxr_linenumber" name="358" href="#358">358</a> 
<a class="jxr_linenumber" name="359" href="#359">359</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="360" href="#360">360</a> <em class="jxr_javadoccomment">     * @return the offset of the first {@link PageIO} which stores the Page on disk.</em>
<a class="jxr_linenumber" name="361" href="#361">361</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="362" href="#362">362</a>     <em class="jxr_comment">/*<em class="jxr_comment"> no qualifier */</em><strong class="jxr_keyword">long</strong> getOffset()</em>
<a class="jxr_linenumber" name="363" href="#363">363</a>     {
<a class="jxr_linenumber" name="364" href="#364">364</a>         <strong class="jxr_keyword">return</strong> offset;
<a class="jxr_linenumber" name="365" href="#365">365</a>     }
<a class="jxr_linenumber" name="366" href="#366">366</a> 
<a class="jxr_linenumber" name="367" href="#367">367</a> 
<a class="jxr_linenumber" name="368" href="#368">368</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="369" href="#369">369</a> <em class="jxr_javadoccomment">     * @param offset the offset to set</em>
<a class="jxr_linenumber" name="370" href="#370">370</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="371" href="#371">371</a>     <em class="jxr_comment">/*<em class="jxr_comment"> no qualifier */</em><strong class="jxr_keyword">void</strong> setOffset( <strong class="jxr_keyword">long</strong> offset )</em>
<a class="jxr_linenumber" name="372" href="#372">372</a>     {
<a class="jxr_linenumber" name="373" href="#373">373</a>         <strong class="jxr_keyword">this</strong>.offset = offset;
<a class="jxr_linenumber" name="374" href="#374">374</a>     }
<a class="jxr_linenumber" name="375" href="#375">375</a> 
<a class="jxr_linenumber" name="376" href="#376">376</a> 
<a class="jxr_linenumber" name="377" href="#377">377</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="378" href="#378">378</a> <em class="jxr_javadoccomment">     * @return the offset of the last {@link PageIO} which stores the Page on disk.</em>
<a class="jxr_linenumber" name="379" href="#379">379</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="380" href="#380">380</a>     <em class="jxr_comment">/*<em class="jxr_comment"> no qualifier */</em><strong class="jxr_keyword">long</strong> getLastOffset()</em>
<a class="jxr_linenumber" name="381" href="#381">381</a>     {
<a class="jxr_linenumber" name="382" href="#382">382</a>         <strong class="jxr_keyword">return</strong> lastOffset;
<a class="jxr_linenumber" name="383" href="#383">383</a>     }
<a class="jxr_linenumber" name="384" href="#384">384</a> 
<a class="jxr_linenumber" name="385" href="#385">385</a> 
<a class="jxr_linenumber" name="386" href="#386">386</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="387" href="#387">387</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="388" href="#388">388</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="389" href="#389">389</a>     <em class="jxr_comment">/*<em class="jxr_comment"> no qualifier */</em><strong class="jxr_keyword">void</strong> setLastOffset( <strong class="jxr_keyword">long</strong> lastOffset )</em>
<a class="jxr_linenumber" name="390" href="#390">390</a>     {
<a class="jxr_linenumber" name="391" href="#391">391</a>         <strong class="jxr_keyword">this</strong>.lastOffset = lastOffset;
<a class="jxr_linenumber" name="392" href="#392">392</a>     }
<a class="jxr_linenumber" name="393" href="#393">393</a> 
<a class="jxr_linenumber" name="394" href="#394">394</a> 
<a class="jxr_linenumber" name="395" href="#395">395</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="396" href="#396">396</a> <em class="jxr_javadoccomment">     * @return the keys</em>
<a class="jxr_linenumber" name="397" href="#397">397</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="398" href="#398">398</a>     <em class="jxr_comment">/*<em class="jxr_comment"> no qualifier */</em>KeyHolder&lt;K&gt;[] getKeys()</em>
<a class="jxr_linenumber" name="399" href="#399">399</a>     {
<a class="jxr_linenumber" name="400" href="#400">400</a>         <strong class="jxr_keyword">return</strong> keys;
<a class="jxr_linenumber" name="401" href="#401">401</a>     }
<a class="jxr_linenumber" name="402" href="#402">402</a> 
<a class="jxr_linenumber" name="403" href="#403">403</a> 
<a class="jxr_linenumber" name="404" href="#404">404</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="405" href="#405">405</a> <em class="jxr_javadoccomment">     * Sets the key at a give position</em>
<a class="jxr_linenumber" name="406" href="#406">406</a> <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="407" href="#407">407</a> <em class="jxr_javadoccomment">     * @param pos The position in the keys array</em>
<a class="jxr_linenumber" name="408" href="#408">408</a> <em class="jxr_javadoccomment">     * @param key the key to inject</em>
<a class="jxr_linenumber" name="409" href="#409">409</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="410" href="#410">410</a>     <em class="jxr_comment">/*<em class="jxr_comment"> no qualifier */</em><strong class="jxr_keyword">void</strong> setKey( <strong class="jxr_keyword">int</strong> pos, KeyHolder&lt;K&gt; key )</em>
<a class="jxr_linenumber" name="411" href="#411">411</a>     {
<a class="jxr_linenumber" name="412" href="#412">412</a>         keys[pos] = key;
<a class="jxr_linenumber" name="413" href="#413">413</a>     }
<a class="jxr_linenumber" name="414" href="#414">414</a> 
<a class="jxr_linenumber" name="415" href="#415">415</a> 
<a class="jxr_linenumber" name="416" href="#416">416</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="417" href="#417">417</a> <em class="jxr_javadoccomment">     * @param revision the keys to set</em>
<a class="jxr_linenumber" name="418" href="#418">418</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="419" href="#419">419</a>     <em class="jxr_comment">/*<em class="jxr_comment"> no qualifier */</em><strong class="jxr_keyword">void</strong> setKeys( KeyHolder&lt;K&gt;[] keys )</em>
<a class="jxr_linenumber" name="420" href="#420">420</a>     {
<a class="jxr_linenumber" name="421" href="#421">421</a>         <strong class="jxr_keyword">this</strong>.keys = keys;
<a class="jxr_linenumber" name="422" href="#422">422</a>     }
<a class="jxr_linenumber" name="423" href="#423">423</a> 
<a class="jxr_linenumber" name="424" href="#424">424</a> 
<a class="jxr_linenumber" name="425" href="#425">425</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="426" href="#426">426</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="427" href="#427">427</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="428" href="#428">428</a>     <em class="jxr_comment">/*<em class="jxr_comment"> no qualifier */</em>ValueHolder&lt;V&gt; getValue( <strong class="jxr_keyword">int</strong> pos )</em>
<a class="jxr_linenumber" name="429" href="#429">429</a>     {
<a class="jxr_linenumber" name="430" href="#430">430</a>         <em class="jxr_comment">// Node don't have values. Leaf.getValue() will return the value</em>
<a class="jxr_linenumber" name="431" href="#431">431</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="432" href="#432">432</a>     }
<a class="jxr_linenumber" name="433" href="#433">433</a> 
<a class="jxr_linenumber" name="434" href="#434">434</a> 
<a class="jxr_linenumber" name="435" href="#435">435</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="436" href="#436">436</a> <em class="jxr_javadoccomment">     * @return the revision</em>
<a class="jxr_linenumber" name="437" href="#437">437</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="438" href="#438">438</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">long</strong> getRevision()
<a class="jxr_linenumber" name="439" href="#439">439</a>     {
<a class="jxr_linenumber" name="440" href="#440">440</a>         <strong class="jxr_keyword">return</strong> revision;
<a class="jxr_linenumber" name="441" href="#441">441</a>     }
<a class="jxr_linenumber" name="442" href="#442">442</a> 
<a class="jxr_linenumber" name="443" href="#443">443</a> 
<a class="jxr_linenumber" name="444" href="#444">444</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="445" href="#445">445</a> <em class="jxr_javadoccomment">     * @param revision the revision to set</em>
<a class="jxr_linenumber" name="446" href="#446">446</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="447" href="#447">447</a>     <em class="jxr_comment">/*<em class="jxr_comment"> no qualifier */</em><strong class="jxr_keyword">void</strong> setRevision( <strong class="jxr_keyword">long</strong> revision )</em>
<a class="jxr_linenumber" name="448" href="#448">448</a>     {
<a class="jxr_linenumber" name="449" href="#449">449</a>         <strong class="jxr_keyword">this</strong>.revision = revision;
<a class="jxr_linenumber" name="450" href="#450">450</a>     }
<a class="jxr_linenumber" name="451" href="#451">451</a> 
<a class="jxr_linenumber" name="452" href="#452">452</a> 
<a class="jxr_linenumber" name="453" href="#453">453</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="454" href="#454">454</a> <em class="jxr_javadoccomment">     * Compares two keys</em>
<a class="jxr_linenumber" name="455" href="#455">455</a> <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="456" href="#456">456</a> <em class="jxr_javadoccomment">     * @param key1 The first key</em>
<a class="jxr_linenumber" name="457" href="#457">457</a> <em class="jxr_javadoccomment">     * @param key2 The second key</em>
<a class="jxr_linenumber" name="458" href="#458">458</a> <em class="jxr_javadoccomment">     * @return -1 if the first key is above the second one, 1 if it's below, and 0</em>
<a class="jxr_linenumber" name="459" href="#459">459</a> <em class="jxr_javadoccomment">     * if the two keys are equal</em>
<a class="jxr_linenumber" name="460" href="#460">460</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="461" href="#461">461</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> compare( K key1, K key2 )
<a class="jxr_linenumber" name="462" href="#462">462</a>     {
<a class="jxr_linenumber" name="463" href="#463">463</a>         <strong class="jxr_keyword">if</strong> ( key1 == key2 )
<a class="jxr_linenumber" name="464" href="#464">464</a>         {
<a class="jxr_linenumber" name="465" href="#465">465</a>             <strong class="jxr_keyword">return</strong> 0;
<a class="jxr_linenumber" name="466" href="#466">466</a>         }
<a class="jxr_linenumber" name="467" href="#467">467</a> 
<a class="jxr_linenumber" name="468" href="#468">468</a>         <strong class="jxr_keyword">if</strong> ( key1 == <strong class="jxr_keyword">null</strong> )
<a class="jxr_linenumber" name="469" href="#469">469</a>         {
<a class="jxr_linenumber" name="470" href="#470">470</a>             <strong class="jxr_keyword">return</strong> 1;
<a class="jxr_linenumber" name="471" href="#471">471</a>         }
<a class="jxr_linenumber" name="472" href="#472">472</a> 
<a class="jxr_linenumber" name="473" href="#473">473</a>         <strong class="jxr_keyword">if</strong> ( key2 == <strong class="jxr_keyword">null</strong> )
<a class="jxr_linenumber" name="474" href="#474">474</a>         {
<a class="jxr_linenumber" name="475" href="#475">475</a>             <strong class="jxr_keyword">return</strong> -1;
<a class="jxr_linenumber" name="476" href="#476">476</a>         }
<a class="jxr_linenumber" name="477" href="#477">477</a> 
<a class="jxr_linenumber" name="478" href="#478">478</a>         <strong class="jxr_keyword">return</strong> btree.getComparator().compare( key1, key2 );
<a class="jxr_linenumber" name="479" href="#479">479</a>     }
<a class="jxr_linenumber" name="480" href="#480">480</a> 
<a class="jxr_linenumber" name="481" href="#481">481</a> 
<a class="jxr_linenumber" name="482" href="#482">482</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="483" href="#483">483</a> <em class="jxr_javadoccomment">     * Finds the position of the given key in the page. If we have found the key,</em>
<a class="jxr_linenumber" name="484" href="#484">484</a> <em class="jxr_javadoccomment">     * we will return its position as a negative value.</em>
<a class="jxr_linenumber" name="485" href="#485">485</a> <em class="jxr_javadoccomment">     * &lt;p/&gt;</em>
<a class="jxr_linenumber" name="486" href="#486">486</a> <em class="jxr_javadoccomment">     * Assuming that the array is zero-indexed, the returned value will be : &lt;br/&gt;</em>
<a class="jxr_linenumber" name="487" href="#487">487</a> <em class="jxr_javadoccomment">     *   position = - ( position + 1)</em>
<a class="jxr_linenumber" name="488" href="#488">488</a> <em class="jxr_javadoccomment">     * &lt;br/&gt;</em>
<a class="jxr_linenumber" name="489" href="#489">489</a> <em class="jxr_javadoccomment">     * So for the following table of keys : &lt;br/&gt;</em>
<a class="jxr_linenumber" name="490" href="#490">490</a> <em class="jxr_javadoccomment">     * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="491" href="#491">491</a> <em class="jxr_javadoccomment">     * +---+---+---+---+</em>
<a class="jxr_linenumber" name="492" href="#492">492</a> <em class="jxr_javadoccomment">     * | b | d | f | h |</em>
<a class="jxr_linenumber" name="493" href="#493">493</a> <em class="jxr_javadoccomment">     * +---+---+---+---+</em>
<a class="jxr_linenumber" name="494" href="#494">494</a> <em class="jxr_javadoccomment">     *   0   1   2   3</em>
<a class="jxr_linenumber" name="495" href="#495">495</a> <em class="jxr_javadoccomment">     * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="496" href="#496">496</a> <em class="jxr_javadoccomment">     * looking for 'b' will return -1 (-(0+1)) and looking for 'f' will return -3 (-(2+1)).&lt;br/&gt;</em>
<a class="jxr_linenumber" name="497" href="#497">497</a> <em class="jxr_javadoccomment">     * Computing the real position is just a matter to get -(position++).</em>
<a class="jxr_linenumber" name="498" href="#498">498</a> <em class="jxr_javadoccomment">     * &lt;p/&gt;</em>
<a class="jxr_linenumber" name="499" href="#499">499</a> <em class="jxr_javadoccomment">     * If we don't find the key in the table, we will return the position of the key</em>
<a class="jxr_linenumber" name="500" href="#500">500</a> <em class="jxr_javadoccomment">     * immediately above the key we are looking for. &lt;br/&gt;</em>
<a class="jxr_linenumber" name="501" href="#501">501</a> <em class="jxr_javadoccomment">     * For instance, looking for :</em>
<a class="jxr_linenumber" name="502" href="#502">502</a> <em class="jxr_javadoccomment">     * &lt;ul&gt;</em>
<a class="jxr_linenumber" name="503" href="#503">503</a> <em class="jxr_javadoccomment">     * &lt;li&gt;'a' will return 0&lt;/li&gt;</em>
<a class="jxr_linenumber" name="504" href="#504">504</a> <em class="jxr_javadoccomment">     * &lt;li&gt;'b' will return -1&lt;/li&gt;</em>
<a class="jxr_linenumber" name="505" href="#505">505</a> <em class="jxr_javadoccomment">     * &lt;li&gt;'c' will return 1&lt;/li&gt;</em>
<a class="jxr_linenumber" name="506" href="#506">506</a> <em class="jxr_javadoccomment">     * &lt;li&gt;'d' will return -2&lt;/li&gt;</em>
<a class="jxr_linenumber" name="507" href="#507">507</a> <em class="jxr_javadoccomment">     * &lt;li&gt;'e' will return 2&lt;/li&gt;</em>
<a class="jxr_linenumber" name="508" href="#508">508</a> <em class="jxr_javadoccomment">     * &lt;li&gt;'f' will return -3&lt;/li&gt;</em>
<a class="jxr_linenumber" name="509" href="#509">509</a> <em class="jxr_javadoccomment">     * &lt;li&gt;'g' will return 3&lt;/li&gt;</em>
<a class="jxr_linenumber" name="510" href="#510">510</a> <em class="jxr_javadoccomment">     * &lt;li&gt;'h' will return -4&lt;/li&gt;</em>
<a class="jxr_linenumber" name="511" href="#511">511</a> <em class="jxr_javadoccomment">     * &lt;li&gt;'i' will return 4&lt;/li&gt;</em>
<a class="jxr_linenumber" name="512" href="#512">512</a> <em class="jxr_javadoccomment">     * &lt;/ul&gt;</em>
<a class="jxr_linenumber" name="513" href="#513">513</a> <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="514" href="#514">514</a> <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="515" href="#515">515</a> <em class="jxr_javadoccomment">     * @param key The key to find</em>
<a class="jxr_linenumber" name="516" href="#516">516</a> <em class="jxr_javadoccomment">     * @return The position in the page.</em>
<a class="jxr_linenumber" name="517" href="#517">517</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="518" href="#518">518</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> findPos( K key )
<a class="jxr_linenumber" name="519" href="#519">519</a>     {
<a class="jxr_linenumber" name="520" href="#520">520</a>         <em class="jxr_comment">// Deal with the special key where we have an empty page</em>
<a class="jxr_linenumber" name="521" href="#521">521</a>         <strong class="jxr_keyword">if</strong> ( nbElems == 0 )
<a class="jxr_linenumber" name="522" href="#522">522</a>         {
<a class="jxr_linenumber" name="523" href="#523">523</a>             <strong class="jxr_keyword">return</strong> 0;
<a class="jxr_linenumber" name="524" href="#524">524</a>         }
<a class="jxr_linenumber" name="525" href="#525">525</a> 
<a class="jxr_linenumber" name="526" href="#526">526</a>         <strong class="jxr_keyword">int</strong> min = 0;
<a class="jxr_linenumber" name="527" href="#527">527</a>         <strong class="jxr_keyword">int</strong> max = nbElems - 1;
<a class="jxr_linenumber" name="528" href="#528">528</a> 
<a class="jxr_linenumber" name="529" href="#529">529</a>         <em class="jxr_comment">// binary search</em>
<a class="jxr_linenumber" name="530" href="#530">530</a>         <strong class="jxr_keyword">while</strong> ( min &lt; max )
<a class="jxr_linenumber" name="531" href="#531">531</a>         {
<a class="jxr_linenumber" name="532" href="#532">532</a>             <strong class="jxr_keyword">int</strong> middle = ( min + max + 1 ) &gt;&gt; 1;
<a class="jxr_linenumber" name="533" href="#533">533</a> 
<a class="jxr_linenumber" name="534" href="#534">534</a>             <strong class="jxr_keyword">int</strong> comp = compare( keys[middle].getKey(), key );
<a class="jxr_linenumber" name="535" href="#535">535</a> 
<a class="jxr_linenumber" name="536" href="#536">536</a>             <strong class="jxr_keyword">if</strong> ( comp &lt; 0 )
<a class="jxr_linenumber" name="537" href="#537">537</a>             {
<a class="jxr_linenumber" name="538" href="#538">538</a>                 min = middle + 1;
<a class="jxr_linenumber" name="539" href="#539">539</a>             }
<a class="jxr_linenumber" name="540" href="#540">540</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> ( comp &gt; 0 )
<a class="jxr_linenumber" name="541" href="#541">541</a>             {
<a class="jxr_linenumber" name="542" href="#542">542</a>                 max = middle - 1;
<a class="jxr_linenumber" name="543" href="#543">543</a>             }
<a class="jxr_linenumber" name="544" href="#544">544</a>             <strong class="jxr_keyword">else</strong>
<a class="jxr_linenumber" name="545" href="#545">545</a>             {
<a class="jxr_linenumber" name="546" href="#546">546</a>                 <em class="jxr_comment">// Special case : the key already exists,</em>
<a class="jxr_linenumber" name="547" href="#547">547</a>                 <em class="jxr_comment">// we can return immediately. The value will be</em>
<a class="jxr_linenumber" name="548" href="#548">548</a>                 <em class="jxr_comment">// negative, and as the index may be 0, we subtract 1</em>
<a class="jxr_linenumber" name="549" href="#549">549</a>                 <strong class="jxr_keyword">return</strong> -( middle + 1 );
<a class="jxr_linenumber" name="550" href="#550">550</a>             }
<a class="jxr_linenumber" name="551" href="#551">551</a>         }
<a class="jxr_linenumber" name="552" href="#552">552</a> 
<a class="jxr_linenumber" name="553" href="#553">553</a>         <em class="jxr_comment">// Special case : we don't know if the key is present</em>
<a class="jxr_linenumber" name="554" href="#554">554</a>         <strong class="jxr_keyword">int</strong> comp = compare( keys[max].getKey(), key );
<a class="jxr_linenumber" name="555" href="#555">555</a> 
<a class="jxr_linenumber" name="556" href="#556">556</a>         <strong class="jxr_keyword">if</strong> ( comp == 0 )
<a class="jxr_linenumber" name="557" href="#557">557</a>         {
<a class="jxr_linenumber" name="558" href="#558">558</a>             <strong class="jxr_keyword">return</strong> -( max + 1 );
<a class="jxr_linenumber" name="559" href="#559">559</a>         }
<a class="jxr_linenumber" name="560" href="#560">560</a>         <strong class="jxr_keyword">else</strong>
<a class="jxr_linenumber" name="561" href="#561">561</a>         {
<a class="jxr_linenumber" name="562" href="#562">562</a>             <strong class="jxr_keyword">if</strong> ( comp &lt; 0 )
<a class="jxr_linenumber" name="563" href="#563">563</a>             {
<a class="jxr_linenumber" name="564" href="#564">564</a>                 <strong class="jxr_keyword">return</strong> max + 1;
<a class="jxr_linenumber" name="565" href="#565">565</a>             }
<a class="jxr_linenumber" name="566" href="#566">566</a>             <strong class="jxr_keyword">else</strong>
<a class="jxr_linenumber" name="567" href="#567">567</a>             {
<a class="jxr_linenumber" name="568" href="#568">568</a>                 <strong class="jxr_keyword">return</strong> max;
<a class="jxr_linenumber" name="569" href="#569">569</a>             }
<a class="jxr_linenumber" name="570" href="#570">570</a>         }
<a class="jxr_linenumber" name="571" href="#571">571</a>     }
<a class="jxr_linenumber" name="572" href="#572">572</a> 
<a class="jxr_linenumber" name="573" href="#573">573</a> 
<a class="jxr_linenumber" name="574" href="#574">574</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="575" href="#575">575</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="576" href="#576">576</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="577" href="#577">577</a>     <strong class="jxr_keyword">public</strong> Tuple&lt;K, V&gt; findLeftMost() <strong class="jxr_keyword">throws</strong> EndOfFileExceededException, IOException
<a class="jxr_linenumber" name="578" href="#578">578</a>     {
<a class="jxr_linenumber" name="579" href="#579">579</a>         <strong class="jxr_keyword">return</strong> children[0].getValue().findLeftMost();
<a class="jxr_linenumber" name="580" href="#580">580</a>     }
<a class="jxr_linenumber" name="581" href="#581">581</a> 
<a class="jxr_linenumber" name="582" href="#582">582</a> 
<a class="jxr_linenumber" name="583" href="#583">583</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="584" href="#584">584</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="585" href="#585">585</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="586" href="#586">586</a>     <strong class="jxr_keyword">public</strong> Tuple&lt;K, V&gt; findRightMost() <strong class="jxr_keyword">throws</strong> EndOfFileExceededException, IOException
<a class="jxr_linenumber" name="587" href="#587">587</a>     {
<a class="jxr_linenumber" name="588" href="#588">588</a>         <strong class="jxr_keyword">return</strong> children[nbElems].getValue().findRightMost();
<a class="jxr_linenumber" name="589" href="#589">589</a>     }
<a class="jxr_linenumber" name="590" href="#590">590</a> 
<a class="jxr_linenumber" name="591" href="#591">591</a> 
<a class="jxr_linenumber" name="592" href="#592">592</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="593" href="#593">593</a> <em class="jxr_javadoccomment">     * @return the btree</em>
<a class="jxr_linenumber" name="594" href="#594">594</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="595" href="#595">595</a>     <strong class="jxr_keyword">public</strong> BTree&lt;K, V&gt; getBtree()
<a class="jxr_linenumber" name="596" href="#596">596</a>     {
<a class="jxr_linenumber" name="597" href="#597">597</a>         <strong class="jxr_keyword">return</strong> btree;
<a class="jxr_linenumber" name="598" href="#598">598</a>     }
<a class="jxr_linenumber" name="599" href="#599">599</a> 
<a class="jxr_linenumber" name="600" href="#600">600</a> 
<a class="jxr_linenumber" name="601" href="#601">601</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="602" href="#602">602</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="603" href="#603">603</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="604" href="#604">604</a>     <strong class="jxr_keyword">public</strong> String dumpPage( String tabs )
<a class="jxr_linenumber" name="605" href="#605">605</a>     {
<a class="jxr_linenumber" name="606" href="#606">606</a>         StringBuilder sb = <strong class="jxr_keyword">new</strong> StringBuilder();
<a class="jxr_linenumber" name="607" href="#607">607</a> 
<a class="jxr_linenumber" name="608" href="#608">608</a>         <strong class="jxr_keyword">if</strong> ( nbElems &gt; 0 )
<a class="jxr_linenumber" name="609" href="#609">609</a>         {
<a class="jxr_linenumber" name="610" href="#610">610</a>             <em class="jxr_comment">// Start with the first child</em>
<a class="jxr_linenumber" name="611" href="#611">611</a>             sb.append( children[0].getValue().dumpPage( tabs + <span class="jxr_string">"    "</span> ) );
<a class="jxr_linenumber" name="612" href="#612">612</a> 
<a class="jxr_linenumber" name="613" href="#613">613</a>             <strong class="jxr_keyword">for</strong> ( <strong class="jxr_keyword">int</strong> i = 0; i &lt; nbElems; i++ )
<a class="jxr_linenumber" name="614" href="#614">614</a>             {
<a class="jxr_linenumber" name="615" href="#615">615</a>                 sb.append( tabs );
<a class="jxr_linenumber" name="616" href="#616">616</a>                 sb.append( <span class="jxr_string">"&lt;"</span> );
<a class="jxr_linenumber" name="617" href="#617">617</a>                 sb.append( getKey( i ) ).append( <span class="jxr_string">"&gt;\n"</span> );
<a class="jxr_linenumber" name="618" href="#618">618</a>                 sb.append( children[i + 1].getValue().dumpPage( tabs + <span class="jxr_string">"    "</span> ) );
<a class="jxr_linenumber" name="619" href="#619">619</a>             }
<a class="jxr_linenumber" name="620" href="#620">620</a>         }
<a class="jxr_linenumber" name="621" href="#621">621</a> 
<a class="jxr_linenumber" name="622" href="#622">622</a>         <strong class="jxr_keyword">return</strong> sb.toString();
<a class="jxr_linenumber" name="623" href="#623">623</a>     }
<a class="jxr_linenumber" name="624" href="#624">624</a> 
<a class="jxr_linenumber" name="625" href="#625">625</a> 
<a class="jxr_linenumber" name="626" href="#626">626</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="627" href="#627">627</a> <em class="jxr_javadoccomment">     * @see Object#toString()</em>
<a class="jxr_linenumber" name="628" href="#628">628</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="629" href="#629">629</a>     <strong class="jxr_keyword">public</strong> String toString()
<a class="jxr_linenumber" name="630" href="#630">630</a>     {
<a class="jxr_linenumber" name="631" href="#631">631</a>         StringBuilder sb = <strong class="jxr_keyword">new</strong> StringBuilder();
<a class="jxr_linenumber" name="632" href="#632">632</a> 
<a class="jxr_linenumber" name="633" href="#633">633</a>         sb.append( <span class="jxr_string">"r"</span> ).append( revision );
<a class="jxr_linenumber" name="634" href="#634">634</a>         sb.append( <span class="jxr_string">", nbElems:"</span> ).append( nbElems );
<a class="jxr_linenumber" name="635" href="#635">635</a> 
<a class="jxr_linenumber" name="636" href="#636">636</a>         <strong class="jxr_keyword">if</strong> ( offset &gt; 0 )
<a class="jxr_linenumber" name="637" href="#637">637</a>         {
<a class="jxr_linenumber" name="638" href="#638">638</a>             sb.append( <span class="jxr_string">", offset:"</span> ).append( offset );
<a class="jxr_linenumber" name="639" href="#639">639</a>         }
<a class="jxr_linenumber" name="640" href="#640">640</a> 
<a class="jxr_linenumber" name="641" href="#641">641</a>         <strong class="jxr_keyword">return</strong> sb.toString();
<a class="jxr_linenumber" name="642" href="#642">642</a>     }
<a class="jxr_linenumber" name="643" href="#643">643</a> }
</pre>
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